Palladium immobilized on amidoxime‐functionalized magnetic Fe3O4 nanoparticles: a highly stable and efficient magnetically recoverable nanocatalyst for sonogashira coupling reaction |
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| Authors: | Hojat Veisi Alireza Sedrpoushan Behrooz Maleki Malak Hekmati Masoud Heidari Saba Hemmati |
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| Institution: | 1. Department of Chemistry, Payame Noor University, Tehran, Iran;2. Institute of Industrial Chemistry, Iranian Research Organization for Science and Technology, Tehran, Iran;3. Hakim Sabzevari University, Department of Chemistry, Sabzevar, Iran;4. Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Chemistry, Pharmaceutical Sciences Branch, (IAUPS), Tehran, Iran |
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| Abstract: | We describe the synthesis of a novel Fe3O4/amidoxime (AO)/Pd nanocatalyst by grafting of AO groups on Fe3O4 nanoparticles and subsequent deposition of Pd nanoparticles. Prior to grafting of AO, the 2‐cyanoethyl‐functionalized Fe3O4 nanoparticles prepared through combining 2‐cyanoethyltriethoxysilane and Fe3O4 were treated with hydroxylamine. The AO‐grafted Fe3O4 nanoparticles were then used as a platform for the deposition of Pd nanoparticles. The catalyst was characterized using Fourier transform infrared spectroscopy, X‐ray diffraction, scanning and transmission electron microscopies, vibrating sample magnetometry, wavelength‐ and energy‐dispersive X‐ray spectroscopies and inductively coupled plasma analysis. Fe3O4/AO/Pd is novel phosphine‐free recyclable heterogeneous catalyst for Sonogashira reactions. Interestingly, the novel catalyst could be recovered in a facile manner from the reaction mixture by applying an external magnet device and recycled seven times without any significant loss in activity. Copyright © 2015 John Wiley & Sons, Ltd. |
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| Keywords: | Fe3O4/AO/Pd magnetic nanoparticles heterogeneous catalyst Pd nanoparticles Sonogashira |
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